*   Added "generic" versions of vector conversions, to cover the common use
    cases involving conversion to and from non-storable vectors.  This
    includes:

    *   `grVec`
    *   `gvecR`
    *   `gcVec`
    *   `gvecC`
    *   `glVec`
    *   `gvecL`
    *   `gmVec`
    *   `gvecM`

    Rewrite rules are included so that you can use these with storable vectors
    without any cost, but don't rely on those.

*   Added big-O analysis to documentation for all functions.